Assassinating until Dtw then a scouting to 0 spies. Burn pots via assassination until they have low pots then strip and steal repeatedly (when they're sleeping preferably).
You'd need xtals if you want to have max efficiency in pissing someone off. First step: Use spies to assassinate until dtw. Burn pots if necessary. Second step: Scout until all their spies are dead Third step. Wait for them to sleep and then hire their allies, and steal all their gold. Fourth step: Self pin until they forget about you.
Just make them reset? Then get a bunch of friends and assassinate them until they're dtw. Then keep them there for as long as possible. So you'll need people who are in different Time Zones so they can keep him in pin.